Compress an image to under 2MB
Get an image under 2MB in your browser. The YouTube thumbnail limit and a common ceiling on content management systems.
KB here means 1,000 bytes, so a file under the number you set is under it whichever convention the form on the other end uses.
Drop JPG, PNG, WebP, HEIC, AVIF, GIF, BMP files here or paste from the clipboard.
Your files are processed on this device. Nothing is uploaded.
Where this limit comes from
Two megabytes is YouTube's hard limit for a custom video thumbnail, which is the most common reason anyone goes looking for this specific number. It is also the default maximum upload size in several content management systems and the per-file cap on a good number of forms that were configured with a round figure and left alone.
What fits in 2 MB
Everything short of a scan or a panorama. Two megabytes is far more than a normal photograph needs, so the search settles at the top of the quality range and nothing about the image changes visibly. For a YouTube thumbnail specifically the binding constraint isn’t the file size at all, it is the 1280 by 720 dimensions and an image at those dimensions has to work quite hard to exceed 2MB.
The thumbnail case
If you’re here for a YouTube thumbnail, the order of operations matters. Set the dimensions first, at 1280 by 720 and only then worry about the file size, because at those dimensions you’re very unlikely to still be over 2MB unless the file is a PNG.
The resizer has 1280 by 720 as a preset. Resize there, then bring the result here only if it is still too large.
Why 2MB is rarely the real constraint
Two megabytes is a lot for an image that is 1,280 pixels wide. The limit exists to stop somebody uploading a 40-megapixel master by accident, not to force compression on a normal thumbnail. If you’re fighting it, check the format before you touch the quality.
Uploads that fail for other reasons
A rejected thumbnail is more often the wrong aspect ratio than the wrong file size. 16:9 is enforced and an image at 1200 by 800 is 3:2 and will be cropped or refused. Check the shape first, the size second.
Common questions
What are the full YouTube thumbnail requirements?
1280 by 720 pixels, 16:9, under 2MB, as JPG, PNG, GIF or WebP. The size limit is the one that fails uploads least often, because an image at those dimensions is rarely that large. Checked September 2026 and worth confirming against YouTube's own help page, since platform requirements move.
My thumbnail is exactly 1280x720 and still over 2MB. How?
Almost always a PNG. A PNG of a busy photographic thumbnail can easily exceed 2MB at those dimensions because it is lossless. Set the format to JPG or WebP here and it’ll drop to a fraction of that with no visible difference.
Does compressing hurt thumbnail quality on YouTube?
YouTube re-encodes whatever you upload regardless, so it is compressed on their side either way. Uploading a reasonable-quality file rather than a maximum-quality one makes almost no difference to what viewers see. What does matter is the dimensions and the contrast, since most people see the thumbnail small.
Can I use this for other platform limits?
Yes, set whatever target you need. The size search works the same for any figure and the dimension presets in the resizer cover the common platform sizes if you need to hit those as well.
Guides
Compress to a specific size
Each of these opens the tool with the target already set.